Sender Policy Framework (SPF) is the record that tells the world exactly which mail servers are allowed to send email on behalf of your domain. Without it, or with it configured incorrectly, anyone can attempt to send mail that looks like it came from you.
SPF is a DNS TXT record published on your domain that lists the mail servers, services, and IP addresses authorized to send email as you. When another mail server receives a message claiming to be from your domain, it checks your SPF record to see if the sending server is on that approved list.
If it's not, that's a signal something may be wrong, whether it's a misconfigured tool you actually use, or someone attempting to spoof your domain entirely. SPF alone doesn't block anything by itself; that enforcement happens through DMARC, which is why the two are built to work together.
We inventory every service that legitimately sends email for your domain, including your website forms, booking platform, and email provider.
We write and publish a DNS TXT record listing those approved senders, formatted correctly to avoid the most common SPF errors.
Every time someone sends mail as your domain, the receiving mail server looks up your SPF record to verify the sender is authorized.
A pass supports normal delivery. A fail feeds into your DMARC policy, which decides whether that message gets delivered, quarantined, or rejected.
SPF is usually the first record in place, and for good reason: it's a prerequisite for a working DMARC policy, and inbox providers increasingly expect it before they'll trust your mail.
Our team will review how your domain currently sends email, build an accurate SPF record, and make sure it's set up as part of a complete authentication strategy alongside DKIM and DMARC.
MDA Insights helps businesses lock down their email domains against spoofing, phishing, and impersonation with SPF, DKIM, and DMARC configured right the first time, and monitored so they stay that way.
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